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ACP+ Preamp/HPA for Yarra Preamp
ACP+ Preamp/HPA for Yarra Preamp
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Old 5th June 2020, 07:33 PM   #1
xrk971 is offline xrk971  United States
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ACP+ Preamp/HPA for Yarra Preamp
Default ACP+ Preamp/HPA for Yarra Preamp

Vunce and I have both built the verification boards for the Pass ACP+ preamp / headphone amplifier in Yarra daughterboard format. This format also is compatible with the M2X amplifier front end bolt holes. Requires +24v supply and can be used as a standalone preamp/HPA.

ACP+ Preamp/HPA for Yarra Preamp-39b72e46-5acd-4973-891f-74e592e7a373-jpeg

The design is basically a miniature Aleph based output stage with a Aleph J or J2 front end (?). It sounds super and is very powerful with deep bass authority. A very nice sounding preamp that has tons of headroom. You will enjoy the sound immensely.

It is a mostly SMT layout in order to make it small enough to fit in the Yarra/M2X board format. However, the small tight layout contributes to an exceptionally low noise and great sounding design.

Thanks to Mr Pass for giving us the go-ahead to make this design for the Yarra/M2X. Thank you to JPS64 for another superb layout.

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Please add your name, number of boards, and country to the interest list below if you would like to see a GB for this happen. Boards will be the usual price of $12 each and 1.6mm thick 1oz copper, ENIG finish. Green solder mask.

GB Interest List:
For example...
JohnDoe / 2 boards / USA
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Last edited by xrk971; 5th June 2020 at 08:32 PM.
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Old 8th June 2020, 03:29 AM   #2
MShipmanPE is offline MShipmanPE  United States
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MShipmanPE/2 boards/ USA
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Old 8th June 2020, 10:52 PM   #3
BigE is offline BigE  Canada
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Is the SMT available already populated?
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Old 8th June 2020, 11:02 PM   #4
thompsontechs is offline thompsontechs  United States
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ACP+ Preamp/HPA for Yarra Preamp
Quote:
Originally Posted by BigE View Post
Is the SMT available already populated?



Lol I was just going to say, if you solder those little bastards Ill take two lmao


Also, are we going to see Chassis for Yarra? You have a new Yarra I think I read somewhere.
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Last edited by thompsontechs; 8th June 2020 at 11:05 PM.
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Old 8th June 2020, 11:08 PM   #5
thompsontechs is offline thompsontechs  United States
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Join Date: Sep 2019
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ACP+ Preamp/HPA for Yarra Preamp
MShipmanPE/2 boards/ USA
thompsontechs/2 boards/USA God Bless it in these trying times!
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Old 8th June 2020, 11:37 PM   #6
xrk971 is offline xrk971  United States
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ACP+ Preamp/HPA for Yarra Preamp
Quote:
Originally Posted by BigE View Post
Is the SMT available already populated?
There is not enough demand for this to be populated by a factory pick and place. So it would be slow manual labor - let me think about it.
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Old 8th June 2020, 11:40 PM   #7
diy40 is offline diy40
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MShipmanPE/2 boards/ USA
thompsontechs/2 boards/USA God Bless it in these trying times!
diy40/2 boards/USA
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Old 8th June 2020, 11:57 PM   #8
Carl_Huff is offline Carl_Huff  United States
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Default ACP Daughterboard

MShipmanPE/2 boards/ USA
Carl_Huff/ 2 boards/ USA
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Old 9th June 2020, 12:06 AM   #9
mnichols30030 is offline mnichols30030
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Default ACP Daughterboard

MShipmanPE/2 boards/ USA
Carl_Huff/ 2 boards/ USA
mnichols30030/2 boards/USA
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Old 9th June 2020, 12:36 AM   #10
thompsontechs is offline thompsontechs  United States
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ACP+ Preamp/HPA for Yarra Preamp
Thanks for deleting GBA, nice touch, what was it about God Bless America was offensive? You didn't type it, but thought you should sensor?


Cancel mine X I know it wasn't you, but this crap just chaps my ***.


JT
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Last edited by thompsontechs; 9th June 2020 at 12:44 AM.
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